Scienziata che confronta fiaschette con liquido colorato, laboratorio detergente - Foto e immagini stock

Chemistry teacher comparing liquids in flasks and showing to camera, discovery

Chemistry scientist conducting researches in office, holding flasks with liquids

Female chemist looking at colored liquids in flasks, developing new substance

Chemistry student dripping liquid in test tube conducting experiment in lab

Female chemist studying presence of sediments in flask with red liquid in lab

Woman scientist holding pipette with liquid and taking test tube with reagent

Boy in protective gloves and glasses studying sediments in flask with red liquid

Clever schoolboy adding drops of agent into tube with green reagent, chemistry

Clever boy writing down result of chemical experiment, laboratory work at school

Schoolboy watching reaction in tube with green liquid, chemistry lessons

Little chemist in protective glasses checking reaction in tube with green liquid

Boy in protective glasses pouring chemical substance in tube, checking reaction